Feed mechanism for punch-presses.



C. ENGLERT.

FEED MEGHANISM EOE PUNCH PRESSES.

AIPLIGATION FILED JULY 25,1912.

Patenta Feb. 24, 1914.

3 SHEETS-SHEET 1.

4FEED MEGHANISM FOR PUNCH PRESSES.

APPLICATION FILI-:D JULY 2 5, 1912,

Patented Feb. 24, 1914.

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C. ENGLERT. FEED MEGHANISM FOR PUNCH PRESSES.

APPLICATION FILED JULY 25, 1912. I A 1,088,01 5, Patented Feb. 24, 1914.

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"UNITED STAT l' f cHAnLns ENGLERT, oF atooHEs'rEn, NEW Yonx.

FEED iincimmsifr non PUNcHREssEs;

Specication of Letters Patent. Aspin-ation inea my 25.21912. serial No. 711,537.

To all whom "it may concern:

yBe it known that I, CHARLES ENomiR'r, a citizen of lthe United States, residing at Rochester, in the county of Monroe and.; State of New York, have invented certain new and useful 'Improvements in Feed Mechanisms for 4Punch-Presses, 'of whichi the following is agspe'ciiication.' 1

My invention relates to afeed mechanismy for punch vpresses and has for its object to provide a device by which a strip. of metal' is fed to the machine intermittently, the machineworking to out 'oii equallengths of, the metal and form them into predeterminedj shapes, according to the to'ols. that aire set inLA Another object ofmy invention 'is to provide a feeding device that willfffeed the;

\ worked on in the ltool's.

metal forward enoughrto .provide the exact 4length fof vmetal that ,is needed to .be ,g

Another object 4of my 'invention is to op,-

erate 'the' feeding' device/from the punoh,

press so that the' feed will'take place whenf the tools are otherwise idle, or on the' up-4 stroke 'of the' 1 ress. .l Y

Another obgect of invention is to pro* vide ready adjustmcntsfin the feeding mechg anism by which the .length ofthe feed may:- be-changed at will. Y, 1 Y

Another objectl of my invention is toprovide an automaticwclamp by which the metali is held in the 'forward position to which it h has been advanced.`

Another object of my invention is to pro 'vide suitable take up devices by which the? wear in the feeding mechanism may be readilycompenszvted for.' j z These and other objects of my, invention'A .will be fully illustrated in the drawings, cle-V scribed. in the 'specification 'end pointed. ont in tbe claims at the end thereof.

ln the accompanying'drawings, Figure 1 is a side elevation of my feeding mechanism' shown together with a portion of the rain and frame of the punch press. Fig. 2 is al top plan View -of the lfeeding mechanism. Fig. 3 is a longitudinal sec-tion onthe line 3 -Bxf of Fig. 2. Fig. 4 is .a transverse sec. tion on the line 4"-4X of Fig. 3. Fig. 5 is a detail view of thevertical rack for driving thel feed mechanism.. Fig. 6 is a perspective view `of the horizontal 'rack fordriving the feed mechanismand .the carriage. Figs. 7 and 8 aredetail-v1ews of .the 4:11p.v

which thebackward movementof the metal is prevented. jFig.l 10 is a cro vtheline 10X-10X of Fig. 6.A 'In the accompanying drawings like reference numerals-refer to like parts.'

AReference numeral 1 indicates the table.

or base of the punch press, on which are` 65 Fig. l, holes 7 and 8 being. rovided in the brackets for .this purpose. e base 4 has the upright standards, 10 11 and 12 in- 15 tegral therewith, in which are mounted 'the` gripping rollers 13` and 14, which rollers are mounted 1n bearin-gs15'and 1'6 as shown incross. section in Fig'. 9L The bearings in these rollers are vcc'mtained in slots'between 8,0

the "uprights, suchI asl are shown at 17 in Fig. 9:5011 top off the lupright.standards 9, 10, 11 'and 12 is "placed the cap 18, which cap is held in position by the four screws 19,

20, 21'and 22. In this c'ap'at each end there- 8.5

.of are suitably threaded openings in which are placed th'eadjusting screws .23 and 24, whlch screws pass through .the cap, 'The cap`.

the screwsA 23 and 24 is provided .a washer '26 and the compression, spring '27, vwhich Vcompression spring at its up er end bears' upon the4 washer 26 and 1.at itsv xlower end upon the bearing 15. spring 27 the bear-jin blocks and the .rollers carried thereby are -orced together -and the, tension-by which vthey are forced together is regulated by the screws l23and 24. The

bearings land 16 are suitably cut away'to 100 receive 'the eccentric ends of the bail 28, which endsl are shown in oval cross section in Fig. 9, as indicated at 29. The normal position of this 4bail 28 is shown in Fi 1, in 4which ,position the bearings 15 an are allowed toapproach each other so as tobring the feeding rollers 13, and 14 into conf tact withl each. other. When the bail is .turnedrtothe position shown in Fig. 9.the 'bearingsare spread, causing the upper iii) Patented Feb '24, 1914'.

I through which the metal isfed. Fig. 9 is a I vertical.. sectional' view on theA line 9*--95 of 'Fig 2, showing the automa-tic clamp by ss section on 60 by `which the feeding de. 7 0

is suitably recessed at each, end under these screws, as 4indicated at.25. .Below each of 9o By the compression 95 roller to raise from the lower one for a puris fed forward I'am now' about to describe.

.Integral with the base 4 are the ribs 31 and 32 onl which are mounted the guides 33 and 34, in which guides is mounted to reciprocate the carriage 35, which carriage is shown in perspective-as a whole in Fig. 6. This carriage-consists of a block 36 mounted to travel under and between the guides 33 and 34. On this block are the ribs 37 and 38. Under the rib 37 a hole 39 is pressed longitudinally thro-ugh the carriage. .Through thisbole passes the pin 40, the pin being rigid therewith. This pin projects on either side of the carriage, as shown-in Fig. 3. On this pin is mounted to Slide the rack bar 41, which rack bar appears in side .elevation in Fig.` 3 and has on each end thereof the depending lugs 42 and 43, which lugs are integral there* with. TheSelugs are perforated to receive the pin'40, and by the engagement between the pin 40 andthe openings in the lugs 42 and 43,-the rack is guided in its forward and backward movement. The pins normally support the rack so that it is' slightly clear from the rib 37 over which it travels. The lugs 42 and 43 are recessed at the side as shown aty 44 in Fig. 6, to receive the flange 47 on the guide 34. The .rack bar 41 overhangs the flange 47, as appears fromFig. 4, and is supported by the flange as it travels back and forth.

Mounted on the base 4 and integral therewith is the upright 48 in which is rotatably mounted the shaft 4Q, to which is keyed the small'pinion 50 and the large pinion 51.

The small pinion meshes with and is driven by the upright rack 52 which will bepresently described, and the large pinion 51 engages with the horizontal rack bar 41, by which the horizontal rack bar is driven back and forth.

' -As shown in Fig. 3, a considerable lost motion is provided between the rack bar 41 y and thev carriage 35. Helical springs 53 and 54 arev provided on the pin 40, surrounding the pin andacting as buffers between the depending lugs 42 and 43 and the carriage 35. The carriage is recessed around the l pins to receive the springs. As the rack bar reciprocates thesle -springs are alternately compressed in the recesses between the carriage and the depending lugs, the springs serving to ease up the jar or shock which the carriage would otherwise receive from the depending lugs on the rack when the lugs drive the arriage, making lthe mechanisml as a who e work more Sllently and smoothly.4

device the lever 55, the pivot for which is s own at' 56. The lever has the eccentric boss 57 around its pivot. Below 'the pivdted lever the carriage 35 is cut, away to an incline 58 and on this incline .'s adj ustably mounted the slide 59, the adj ustxii'entl of this slide forward and back being secured by the adjusting screw 60 which works in the carriage block 3 6.

.This screw 60 is shown in Fig. '6 as having asquare and hexagon head, both of which are integral with the screw. The slide 59 F has the lug 61 thereon, in which lug is the horizontal perforation 62 through which the screw 60 passes. This opening is not threaded, so that the slide'59 moves freely along the screw 60. The lug 61 has the vertical threaded opening 63 therein through which passes the clamping screw 64 by which the slide 59 is fixed in anyl osition that may be desired. The slide 59 ls-adjusted to its proper position so that between the slide and the eccentric boss 57 of the lever 59`the metal strip 30 may be suitably pinched and fed forward on the travel. of the carriage to the left from the position shown in Fig. 3.

On the right hand end of thelrack bar` 41 is provided integral therewith, the CamL lug 65. This lug has the bevel 66 thereon and the lever 55 is likewise beveled at 67, which parts coperate to lift the lever so as to pinch`the metal strip 30, as will now be described. When the rack bar 4l is at the extreme left, the lever 55 hangs down, giving ample clearance between the eccentric boss 57 and-the adjusting plate 59. This will be the rack bar 41 1s at the extreme lleft from the position shown in Fig. 3. When the rackbar starts to the ri ght, being driven by the pinion 51, the cam lug advances into engage- .'nent with the cam 67 on the lever 55 and causes thelever to be lifted at its right hand end to the position shown in Fig. 3.` Upto this timethe carriage block 36 remains stationary, but as the cam lug- 65 advances it causes the lever 55 to raise and pinch the metal and at the same time the depending lug 43 compresses the spring 54 until the.

carriage block 36 is driven thereby, causing all of the artsof the carriage to be advanced, toget er with the metal strip 30, until the rack bar 41 and the carriage of which -it is a part, reach the end of their movementas determined by the drive of the inion 51. The rack bar then starts back independent of the carriage` block 36, permitting the lever 55 to drop and disengage itself from the strip of metal 30, the carriage block, 36 with the lever 55 in the meantime remaining stationary until the depending .lug 42 comes intocontact with the spring- 53 and compresses it and drives the carriage block 36 in the reverse direction.

The rotation of the pinions 50 and 51 is ositionY of the parts when the iso ' Loaders determined by the vertical rack 52' which has the lugs 69 and. 70 .thereon throu h which passes the pin 71, which pin srigi with the arm 72 which is fastened'tofthe ram 3 of the press, as shownfin. Fig. --L The rack 52 is mounted to travel loosely on the pin 71, bein heldtoa right-line motion by the 'bearmg between therackand the end ofthe arm 72'. f As shown in Figs. 1 and 5, a lost motion is provided between the rack bar 52' and the armv 72, which lost motion is determined as follows 0ny the upper end of thepin 71 are the two lock nuts 73 and 74, which `lock nuts may be clamped in position against each other on thev in 71 up or down, as may be desired, the pin. 71 being threaded for this purose. As the 'arm 72 rises the'rack bar will e driven up by the contact between the arm 72 and the lug 69, and as the arm 72 descendsI the rack bar 52 willfbe driven down by the contact between the lock n'ut 73. and the lug 69 or by the Contact between the arm 72 and the'lug 70.` If the armf72 makes Contact `with both vthe lugs 69 and 70 the greatest-lost motion will be. allowed loev 'tween the' arm `72 and the rack 52, and thel rack will have its shortest travel.

The travel ofthe rack bar will be lengthened by turning the lock ,nuts 7 3 and 74 down to- Ward the' arm 72. It is obvious that the travel of the-rack bar will be shortened from the travel of the arm 72 by the distance between the lock nut 7 Sand the arm 72 on the' in 71, less the thickness of the lug 69. y varyingthe position of the nut 73 on the pin 71, the travel of the rack bar may be lengthened or shortened at will and the feed 33 but not with thebase 4 or the rib 31. As

the screw 8B is turned it compresses the spring 86 and draws the guide 33 down yleldingly on the ribl at that end. The guide 33 is tapered so that it slopes downward slightly toward-the screw 83 and in 'consequence must be slightly `lifted by the carriage as it app: oaches that end, thus increasing or decreasing the frictional resistance to the movement of the carriage as it travels back andforth. This frictional resistance is thrown on the carriage block when it is iii the position shown in Fig. 3, and holds it against movement until it. -is

positively moved by the ber and lug'` 4closed by the rack bar at the. other en 4a .f1-en am position. This msnm; as li-ftlng of the lever 'rand the gripping of the material 4to be -fedbefore the carriage block. 36j starte forward', and when does `v start forward it makes it certain that it wild carry the metal strip 30 with it, insultin the proper and accurate feed. The u rig t 38 maybe made adjustable along t e,y base i and this` permit of changes: in the*4 sinne of the pinion 50. which is supportedv thereby, without disturbing the position of v the rack 52 on the ram. In this way a.v great Yaris-tion in the lengthof stroke ofthe iced ing mechanism can be secured. f

'Having thu'sdescribed my inventiomwhat A I claim as new'and' patentable is as follows:

1. In'a feeding mechanism fora punch press, `the 'combination of a base,,a carriage mounted to reciprocate thereon, 'a clutch.

mounted in said carriage, means for closing saldclutoh on a strip ot metal, means for advancing the clutch'with the strip of metal,

means for opening the clutehnatthe end of its Aforward movemenhand means for retracting saidl clutch 'while it `isopen said meansincluding a rael; bar having a moya ment both with" and independent of the ear- 2. In a feeding mechanism Vfor 'a vpunish press, thecombination of a base, afcarriage' mounted to reciprocate therein, afelutch 1n saidearriage and' reciprocating therewith,

ymeans operating to close said elutelr at one -end of its movement and to open saidl clutch at the other end of its movement said meenaincluding a rack bar having a movement both with and. independent of the carriage.

A8.111- a feed-ing mechanism for a punch press,.the combination oi-a base, a carriage' mounted to reciprocate therein, a rack bar for driving said carriage, sand rack; bar being mounted tofreciproeateon said base in-r dependent'of the carriage for a portion4 ofits movement and with the carriage for the balance of its movement n clutch in said cairriage, said clutch being 'opened by the rack bar at one end of its movement and bein of its movement,

4. ln a feed mechanism for a punch press.,

the combination of a base, a carriage mounted to reciprocate thc-rein, a rack bar for driving said carriage, said rack bar being mounted to reciprocate on said base, said rack bar causing said carriage to reciprocate therewith in a portion of its movement only a clutch mounted on said carriage, said clutch being opened or closed by the surplus movement oi' the rack bar.

5. ln a feedingmechanism for a punch press, the combinatie/n oi' a base, a carriage mounted to 'reciprocate therein, a rack bar for driving saidcarriage bein mounted to .reci recate on said base, a clutc 1 mounted in sai carriage, means ou said rack bar `o per!{zt.'-.v

ing first to close the clutch and then advance after to open the clutch without' moving the carriage and then retract the carriage as a whole. 1

7. In a feeding/mechanism for a punch press, the combination of a base, a carriage mounted to reciprocate thereon, a rack for drivin said carriage, said rack havin@ a limite movement on the baseindependent of the carriage, a lever mounted` on said carriage, a vcam on the end of said lever, a cam on said rack engaging with the cam on the lever, 'by which the end of' the lever is lifted by the 4movement ofthe rack independent or the carriage.

8.`In a feeding mechanism for a punch press, the combination of a base, a carriage mounted to reciprocate thereon, arack for driving said carriage, said rack having a limited movement'on the base independent of the carriage, a lever mounted on said carriage, a cam on the endof said lever, a cam on said rack'engaging withy the cam on the lever,V by which -the end of the lever isl lifted by the movement of the" rack independent of the carriage, a lug on said rack engaging .with rf aid carriage to move the carv riage with the rack.

9. In afeeding mechanism fora punch press, the combination of abase, a carriage mountedto reciprocate thereon, a rack forl driving said carriage, said rack having-a limited movement onthe base independent Y of the carriage, a lever-'mounted on said car rlage, a cam on the end of said lever, a cam on said rack engaging with the cam on the lever, by which the end of the lever is lifted by the movement of the" rack independent of the carriage, said lug engaging with the carriage to move it after the lifting` of the lever has been completed.

10. In a feeding mechanism for a punch press, the combination of a base, a carriage mounted to reciprocate thereon, a pin fixed in said carriage and projecting. from each end thereof, a rack mounted to slideon said pin and drive said carriage.

1l. In a feeding mechanism" for a punch press, the combination of a base, a carriage mounted to slide thereon, a lever pivotally mountedl onsaid carriage, an eccentric on saldl lever adapted to press material against said carriage, a wedge shaped plate in said carriage below said eccentric 'with which'I .said eccentric coperates, said 'plate being',-

movable longitudinally to adjust it towar and away from said eccentric.

12. In a feeding mechanism for a unch press, the combination' of a base, guides on said base, one of said guides at one end' thereof being yieldingly connected to said base and sloping toward said base, a, carriage mounted to move in said guides, said carriage being adapted to lift one of said uides as 1t approaches theend thereof lwhich is downwardly sloped.

13. InV a feeding mechanism for auncnress the combination of a bas'e u1 es on p 7 5 D said base, a carriage mounted' to reciprocate onsaid guides, said guides being arranged with respect to said carriage to permit the free movement of the carriage therein at one end thereof and cause said carriage to jam thereinat the other end thereof.

14. The combination in a punch press of a table and a frame therefor, a ram' 'mounted to'reciprocate in said frame, a rack mounted to reciprocate with said ram, a feeding device attached to said press, said device having a rack and clutch thereon, pinions meshving with the two racksl to causev the recipro- 'cation of the rack and clutch from the rack on the ram.

15. The combination in a punch press of a ram, a rack mounted thereon to move arallel therewith, .lost motion being-,provided between said Arack and said ram, means for varying the amount of lost motion between said rack and said'ram at will..

16. The combination in a punch press of a ram, a rack mounted thereon to move arallel therewith, lost motion being'provided between said rack and said ram, means for varying theamountA of lost motion between said rack and said ram at will, a feeding device driven by said rack, said feeding device operating to feed. at right angles to the path ofvmovement of the ram. l

17. The combination in a punch press of a ram, a rack mountedithereon to move arallel rtherewith, lost motionbeing provlded between saidrack and said ram, means for varying the amount of lost motion between sai rack and said ram at will, a feeding device driven by said rack, said feedin device operating to feed at right angles to t e path of movement of the ram, said feeding device operating to feed toward the ramfbn the upstroke of the ram.

In testimony whereof I affix my signature in presence of two witnesses.

` CHARLES ENGLERT. Witnesses: i

LENA IM. ASH, ALICE M. JoHANNs. 

